Finding the Fourth Proportional to 2,483.72, 3,725.34 and 840.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,483.72 : 3,725.34 = 840.24 : x
2. Step 2: Convert to fraction form
   2,483.72/3,725.34 = 840.24/x
3. Step 3: Cross multiply
   2,483.72x = 3,725.34 × 840.24
4. Step 4: Simplify right side
   2,483.72x = 3,130,190.50
5. Step 5: Solve for x
   x = 3,130,190.50/2,483.72
6. Step 6: Final answer
   x = 1,260.28